Abstract
This letter presents a novel structure of passive rectifier unit working
in very high frequency (VHF) which could be used in implant devices in
medical field or in sensor devices in internet of things (IoT)
applications. The proposed rectifier utilized AC magnitude coupling
adjustment technology which can effectively improve the PCE performance
when the input voltage is high. Thus, the rectifier can hold high power
convention efficiency (PCE) in a wide input range. The proposed AC
magnitude coupling adjustment technology is based on tuning the
capacitance, thus can adjust the coupled AC magnitude on the gate of the
corresponding MOSFET. According to our simulation, the proposed
rectifier structure can effectively improve the PCE performance when the
input voltage is high, which can achieve a PCE higher than 60% in a
wide input voltage range from about 0.8V to 3.3V.